Home / 2,900.17-4,001.18-1,781.47

Finding the Fourth Proportional to 2,900.17, 4,001.18 and 1,781.47

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Solution

The fourth proportional to 2,900.17, 4,001.18 and 1,781.47 is: 2,457.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.17 : 4,001.18 = 1,781.47 : x
  2. Step 2: Convert to fraction form
    2,900.17/4,001.18 = 1,781.47/x
  3. Step 3: Cross multiply
    2,900.17x = 4,001.18 × 1,781.47
  4. Step 4: Simplify right side
    2,900.17x = 7,127,971.85
  5. Step 5: Solve for x
    x = 7,127,971.85/2,900.17
  6. Step 6: Final answer
    x = 2,457.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.